Translate select options in Symfony2 class forms

You can use the translation resources as usual. This worked for me:

    $builder->add('sex', 'choice', array(         'choices'   => array(            1 => 'profile.show.sex.male',             2 => 'profile.show.sex.female',        ),        'required' => false,        'label'     => 'profile.show.sex.label',        'translation_domain' => 'AcmeUserBundle'    ));

And then add your translations to the Resources->translations directory of your Bundle.

Update from @CptSadface:

In symfony 2.7, using the choice_label argument, you can specify the translation domain like this:

'choice_label' => 'typeName','choice_translation_domain' => 'messages',

Without specifying the domain, options are not translated.

I searched a while to find an answer, but finally I found out how Symfony translates form content. The easiest way in your case seems to be to just add a translation for "yes" and "no" by adding a YAML or XLIFF translation file to your application (e.g. app/Resources/translations/messages.de.yml) or your bundle. This is described here: http://symfony.com/doc/current/book/translation.html

The problem - in my opinion - is that you don't seem to be able to use custom translation keys. The guys from FOSUserBundle solve this (or a similar) problem with "Form Themes" (http://symfony.com/doc/2.0/cookbook/form/form_customization.html). Here are two significant lines of code to achieve the usage of the form element id as translation key:

https://github.com/FriendsOfSymfony/FOSUserBundle/blob/master/Resources/views/Registration/register_content.html.twig#L1 / https://github.com/FriendsOfSymfony/FOSUserBundle/blob/50ab4d8fdfd324c1e722cb982e685abdc111be0b/Resources/views/form.html.twig#L4

By adding a Form Theme you're able to modify pretty much everything of the forms in the templates - this seems to be the right way of doing this.

(Sorry, I had to split two of the links b/c I don't have enough reputation to post more than two links. Sad.)

In symfony 2.7, using the choice_label argument, you can specify the translation domain like this:

'choice_label' => 'typeName','choice_translation_domain' => 'messages',

Without specifying the domain, options are not translated.